Process of making bisulfite liquor.



Uurrnn srarns PATENT clinica.

NOBLE HEATH, OF AN'IIOCH, CALIFORNIA, ASSIGNOR OF ONE-FOURTH TO WALTER l'VRlGllT AND EFOURTH TO JAMES W. STEWART, OF CHICAGO, ILLINOIS, AND ONE-FOURTH TO JOHN H. VVINSLOW,

' OF GLENCOE, ILLINOIS.

Specification of Letters Patent,

Patented Sept. 11, 1906.

Application led October 19,1905. Serial Nov 283.486.

T0 (LH zei/1.0m, zit 'mr/y concern.:

Be it known that I, NOBLE HEATH., a citizen of the United States, residing at Antioch, in the county of Contra Costa and State of California, have invented certain new and usehil Improvements in Processes of Making Bisulfite Liquor, of which the following is a specification.

My invention relates to. improvements in processes for the manufacture of wood-pulp.

The object of my invention is to provide an improved andeleient process for preparing bisulfite liquor Vfor digesting woodpulp for the manufacture of paper, which 'process' may be operated continuously, rapidly, and economically to produce a highgrade product., and which shall more completely utilize the sulfur-fumes or like element, and'which shall be compact and economical of installation and operation. These and such other objects as may hereinafter appear are attained by my invention, a convenient embodiment of which is shown in thel accompanying drawings, vin which-.-

Figure l shows an elevation of a complete plant. DFig. 2 is a plan View, and Figs. 3 and 4 areenlarged details.

Like' characters of 'reference indicate the same parts in the several iigures of the drawines. l

Ieferring by characters to the accompanying drawings, A and B indicate tanks which are filled, preferably, about two-thirds full of linie-water or lime-.water and magnesia or like mixture through suwily-openings which are tightly closed by the covers C.

D is a furnace, suc/h as a sulfur-furnace, where sulfur is burnodither separa tely or in combination with other chemicals, as may be desired.

E and F are cylindrical vpumps operated from shafts ef, respectively, said pumps convnectingwith the tanks A and B through pipes G and H, Fig. 2.

I is a fumes-p1pe for conducting fumes from the furnace l) and connecting with mixing-pipes J and K, said'mixing-pipes leading .into the tanks A and below thc fluid-level therein.

L is an exhaust-fumes pipe rising from the tank A and connecting with the mixing-pipe K, while M is a like exhaust-fumes pipe leading from the tank B to the mixing-pipe J.

and O are Vents from the tanks A and B, respectively, while P and Q are dischargepipes from the tanks A and B, respectively.

l, 2, 3, 4, 5, 6, '7, 8, and 9 are controlvalves, 5 and 8 being preferably three-way valves.

R is a union between the fluid-pipe T, which leads from the pum-p E to the mixingpipe J, and S is a like union between the corresponding pipe U and the mixing-pipe K. These unions are Alocked at a considerable height above the fluid-level in the tanks A and B to create an induced o'rforeed draft through the fumes-pipe I in a manner hereinafter explainedand may be conveniently constructed as shown in Fig. 3, the branch fumespipes i and t leading into a nozzle, such as 1, in the interior of the unions R and S, so that the falling column otwater in the mixingpipes J and K will induce a forced draft of fumes through the fumes-pipe I and branch fumes-pipe i or fi', .as the case may be, into the mixing-pipes J and K, respectively.

With the apparatus set as shown in Fig. 1,

in which valves 1, 2, 3, and 4 are shown as open, 5 and 8 are shown as closed against the outlets P and Q, and 6, 7, and 9 are shown as closed, the operation is as follows: The pumps E and F being in operation and sulfur being hurried in the furnace D, the pump E will elevate the fluid mixed in the tank A to the union 1t, whence the fluid will fall through the mixing-pipe J a considerable distance, preferably from twenty to twenty-five feet, thereby not only allowing, but causing, the fluid to be broken into fine particles and to create a strong exhaust from the fumes-pi e I and branch fumes-pipe 1'., so serving tlie double purpose of drawing the sulfur-fumes' into the mixing-pipe J and of mixing such fumes with the inely-divided fluid, thereby exposing a maximum fluid surface to the sulfur-fumes, and so facilitating' in the bestimmuer the absorption by theI fluid of the ele'- ments contained in the sulfur-fumes, and thus transforming the lime-water or lime-Water and magnesia into a bisulite of lime or of linie and ma ncsia. While the continued operation of t e pump E causes the contents IOS i 'I withthe union l, the tank A is recharged -tiie same machinenv serves to erontvtne of the tank A to continuously pass the circuit l ofl the fhiid-pipe Tand the mixing-pipe J and to be continuously intermingled in the mixing-pipe J wit-li the sulfuious fumes untilthe fluid mixture in the tank A has attained the desired strength, the unabsorbed fumes which escape from the fluid alter it returns to the A tank Aare free to rise through the exhaustfumes pipe li. Meanwhile the pump F, being in continuous operation elevatcs, the contents of the tank B through the fluid-pipe U and union S into the mixing-pipe K, thereby inducing an active flow of' the exhaust-fumes i through the exhaust-fumes pipe li and union S into the mixing-pipe K. where the unabsorbed elements of' sa id fumes are further absorbed by the fluid from the tank B, and as such mixture of fumes and fluid returns to the tank B through the mixing-pipe K any remaining fumes which have not been absorbed are free to escape through the vent O. When the contents of the tank A have attained the desired strength, which of course will be long before the contents of thcsec-ondary tank B have reached that sainestrength, the valves 2 and I will he closed. thel v'alverf' and 9 will'be opened, and valve 5 will lifbel: so as to close communicationbetween the fluid-pipe Tand the union lt and to open commiinication between the fliiid-pipe T and the outlet l), whereupon as the pump E continues to operate the contents of the tank A will be discharged to any suitable vat, digestei', or other receiving device, and meanwhile, the pump l" continuing in operation, the contents of the tank l will be circulated through the fluid-pipes ll and K and thc exhaust-fumes will continue to discharge through the vent. t). As soon as the tank A- lias been emptied the valve 5 is set to close the outlet l and to reconnect the fluidpipe with fresh solution, the valve 7 is opened, and the valve 4 closed. whereupon the tank B becomes the primary tank, the exhaust-fumes from the tank B are conducted through the exhaust-fumes pipe M and branch `fumespipe i to the union R and finally escape through the vent N, and in due time by a. like manipulation of the valves as before the contents of' the tank B are pumped out, the tank A ruiming independently meanwhile.

, It will thus be seen that with my apparatus tbe-fumes are passed successivebT through solutions varying as to the quantity of fumes previously absorbed, so that the sulfur-fumes are utilized in the best manner, two tanks of material may be simultaneously treated, while, without'stopping the mechanism, the i treatment will continue with on(` tank while.

other tank. :ind by unionsl R ani-l S so the long falling columns of water i pmdu an .induced current' of'fumes net (.icpendent i my arrangi nu iittof' the. g

as tgutilize the action of at all upon the spe: d with which the umps i cause the fluid to pass through the c-ircu atingpipes and I insure an expansion and breaking up of tlic water column which facilitates thiintimate intermixture of the water with the fumes, and since the water absorbs fumes only on its surface I insure the exposure 0f, a large water surface tothe intermingled fumes, thus-producing a better product more rapidly, and thereby more economically utilizing the sulfur or like chemicals. S0, also, wlicre for any reason it is not desirable to run both pumps or where either pump gets. out of order or needs repairs either pump and taal may be run iiulepeiidently, and while no1 as efficiently utilizing the full strength ol'lthc sulfur-fumes either tank when run independently will insure thc`rapid and econhmital roduc-tion of lruniform quality of produc-t.

t will be further note-d that while the embodiment of my invention shown in the drawings is what I cooriucr :i pri f'erred construction the basic idea ot' causing the.` fluid to fall a relatively great distance into the tanks, whereby the forced draft of the fumes, 'the breaking up of the water into Sinall'partldci and consequent intimate intermingling ot the fumes and the fluid solution, and the ideas of further utilizing the exhaust-,fumes and of using the circulating-pumps as a means to discharge the contents of the tank from the mixing system may be utilized by various other obvious arrangements and connections of the various pipeswitli eac-h other within the broad process covered by the claims.

W'hile I claim the apparat-us here shownas which comprises." supplying sulfurous fumes to a conduit and causing a column of a fluid ysolution to fall through said conduit from such a height as to induce a flow of said fumes into said conduit and the intermiiigling of said fumes and said fluid solution.

2. The process described which comprises 'suppl ying sulfurous fumes to the upper portion of a conduit, and causing a column containing liine in solution to fall through said conduit from such a height as to roduce the attenuation and division of said uid column and an induced flow of said fumes into said conduit, whereby said fumes and .said attenuated fluid column are intimately intermingled.

Ji. The process of manufacturing'bisulfite,

whiclh comprises rovding a supply of sul- I'urous fumes, inc osing a column of a fluid solution. causing the fluid of said columnto hill from such a height as to cause an induced flow of said siilfuroiis f'uines toward' said col- IOS ISO

umn, and the intermingling of said fumes and said fluid solution. t

l 4. Theprocess of manufacturing bisulfite -of e solution of lime, causing the fluid of said which comprises providing a supply of sulfurous fumes, providing a falling fluid column column to fall from such e Vheight as to prol duce the attenuation and division of seid l fluid column and so es to induce said fumes to flow toward said column and to intimately l interminglc with said attenuated and divided fluid' column.

5. The process of manufacturing bisulfite l which comprises continuously generating a body of sulfurous fumes` providing a felling r i i column of e Huid solution, inolosingsaid column of fluid solution7 inclosing said body of l fumes and directing the flow thereof into said column of fluid solution, and causing the fluid of said falling column to continuously flow from such e said columnvto be broken up and finely divided and to cause said bodyof -sulfurous fumes to continuously How toward andA intil mately intermingle With said falling .and

finely-divided column/of fluid solution;

.f NQBLE'HEATH.

Witnesses: Y o

, J. C. HARDING,

'J. P. ABBOTT` height as to cause the fluid of 

